沥青路面快速喷补技术与设备研究

发布时间：2018-04-14 17:40

本文选题：路面快速修补 + 坑槽喷补工艺　；参考：《长安大学》2014年硕士论文

【摘要】：随着我国高等级公路的建成和高速发展，交通量日益增加，重载超载现象普遍存在，加上自然灾害对公路的破坏，养护工作已显得越来越重要，其中坑槽病害等是高等级公路普遍存在的现象，研究快速高效的坑槽修补方法迫在眉睫。目前欧美发达国家已经通过多年的试验研究，证实喷射式修补方法是一种快速、低耗并且有效的坑槽修补方法，但是，我国对此所做的研究较少。在这样的背景下，本文从系统的角度出发，主要研究了适合喷射法作业的材料、工艺、设备以及关键技术，旨在引进吸收这种新型的坑槽修补技术。通过对现有主要的坑槽修补方法的比较分析，，确定喷射式坑槽修补方法的可行性以及优点。针对这种新型的坑槽修补技术，本文首先研究了其工艺过程，其次依据工艺要求介绍了整机的关键系统，最后对其气力输送系统进行了理论分析，并对气固喷射器进行了仿真优化，具体如下。一、针对工艺特点，确定适合喷射的修补材料，制定喷射式坑槽修补方法的工艺步骤。结合工艺特点，从提高坑槽修补质量的角度出发，分析适合喷射修补的黏结剂、乳化沥青和集料。二、依据喷射式修补方法的工艺步骤，为实现各个工艺操作的有效执行，确定该修补方法所需的关键系统，研究关键子系统的原理及要求，确定关键子系统的内在联系及整机动力路线。三、以气力输送理论为基础，以Matlab为计算工具，利用龙格库塔法求解了气力输送的运动微分方程，分析了不同因素对输送特性的影响；提出了适合喷射式修补方法气力输送系统输送效率的评价指标，研究了直管道气力输送系统在不同条件下气流速度、压强、混合比和管道内径对工作效率的影响。在此基础上设计计算了输送管道及气固喷射器。四、以计算流体力学软件Fluent为工具，利用欧拉模型对气固喷射器进行了两相流仿真，对比分析了仿真结果和理论计算的差别及其原因；通过不同结构的气固喷射器的仿真对比，分析了影响气力输送性能的内在因素，并对气固喷射器进行了仿真优化。
[Abstract]:With the construction and high speed development of high grade highway in our country, the traffic volume is increasing day by day, the phenomenon of heavy load and overload exists widely, and the natural disasters destroy the highway, so the maintenance work has become more and more important.Pothole disease is a common phenomenon in high-grade highway, so it is urgent to study a fast and efficient method for repairing potholes.At present, the developed countries in Europe and the United States have proved that the jet repair method is a fast, low consumption and effective pothole repair method through many years of experimental research. However, our country has done less research on it.Under this background, this paper mainly studies the materials, technology, equipment and key technologies suitable for jet operation from the point of view of system. The purpose of this paper is to introduce this new type of pit repair technology.By comparing and analyzing the main methods of pothole repair, the feasibility and advantages of jet method are determined.In view of this new type of pothole repair technology, this paper first studies its technological process, secondly introduces the key system of the whole machine according to the technological requirements, and finally carries on the theoretical analysis to its pneumatic conveying system.The gas-solid injector is simulated and optimized as follows.The main contents are as follows: 1. According to the characteristics of the process, the suitable repairing materials are determined, and the process steps of the jet pit repair method are worked out.From the point of view of improving the quality of pothole repair, the adhesive, emulsified asphalt and aggregate suitable for jet patching are analyzed.Secondly, according to the technological steps of the spray repair method, in order to realize the effective execution of each process operation, the key system needed for the repair method is determined, and the principle and requirements of the key subsystem are studied.Determine the internal relationship of the key subsystems and the overall power line.Thirdly, on the basis of pneumatic conveying theory and Matlab as calculation tool, the differential equation of motion of pneumatic conveying is solved by Runge-Kutta method, and the influence of different factors on transport characteristics is analyzed.This paper presents an evaluation index for the conveying efficiency of pneumatic conveying system suitable for jet repair method, and studies the effects of airflow velocity, pressure, mixing ratio and pipeline inner diameter on the working efficiency of the pneumatic conveying system of straight pipeline under different conditions.On this basis, the pipeline and gas-solid injector are designed and calculated.Fourthly, using the computational fluid dynamics software Fluent as the tool, the two-phase flow simulation of gas-solid injector is carried out by using Eulerian model, the difference between simulation results and theoretical calculation and the reasons are analyzed, and the simulation comparison of gas-solid ejector with different structures is made.The internal factors affecting the pneumatic conveying performance are analyzed, and the simulation optimization of the gas-solid injector is carried out.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U418.6;U416.217

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